Cord-knotting apparatus for grain-binder



(Model.) 4 sheets-#sheen 1.

W. W. BURSON.

CORD KNOTTINRv APPARATUS POR GRAIN BINDRRS. No. 273,812. Patented Mar.13.1883.

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(Model.) 4 Sheets-Sheet 2. W. W. BURSON.

CORD KNOTTING APPARATUS POR GRAIN BINDERS. No. 273,812. PatentedMar.13,1883.

HHHIHIIIIIS Inventor:

(Model.) 4 Sheets-Sheet 3.

W. W. BURSON.

CORD KNOTTING APPARATUS PoR GRAIN RINDRRS.

No. 273,812. Patented Mar. 13,1883.

(Model.) 4 Sheets-Sheet 4.

W. W. BURSON.

CORD KNUTTING APPARATUS FOR GRAIN BINDRRS. No. 273,812. Patented Mar.13.1883.

Inventor.'

A( @MOA n Lnhugmpmr, washington. n. c.

' Aralar \VILLIAM IV. BURSON, OF ROOKFORD, ILLINOIS.

CORD=KNOTTING APPARATUS FOR GRAIN=NDR3.

SPECIFICATION forming part of Letters Patent No. 273,812, dated March13, 188%.

(Model.)

To all whom it may conce/ra Be it known that LWILLIAM WORTH BUR- SON, ofRockford, VVi'nnebago county, Illinois, have invented a new and usefulImprovement on Cord-Knotting Apparatus Applicable to AutomaticGrainBinders, and for other purposes; and I d o hereby declare that thefollowing is a full and complete description of the same.

The devices whereby the material to be bound is gathered in a bundle andthe cord placed around the same are not shown nor described,

because they are not material to the operation I ot the devices wherebythe ends oi' the band are knotted together, and it is to be understood,therefore, that the knotting apparatus shown and described herein iscapable of use with anymechanisin capable of placing the material to beknotted properly in the'knotter.

My knotter belongs to that class wherein a hook curved in a planeperpendicular to the axis of' rotation is employed to effect theformation of a loop or bight ot' the cord through which the end or endsof the same are drawn by a backward rotation of said hook to form theknot; and it consists, first, in a knottinghook curved in a planeperpendicular to its' axis of rotation concealed behind a plate parallelwith said hook and provided with a trailsverse slot, through which thecord may enter to be engaged by the hook; second, in a structure of saidhook which facilitates the turning of the cord from the lower to theupper side of the same; third, in a switch or clasp on the lower side toprevent an improper engagement of the loop with the secondary hook,whereby the cord ends are held; fourth, in the grooves in the edge andface of the hook wherein the stripping-pins are concealed, to arrest theloop on the backward motion ofthe looping-hook; iifth,'in theconfiguration ofthe supplemental or holding hook.

That others mayfully understand my invention, I will particularlydescribe the same, having reference to the accompanying drawings,wherein- Figure lis a perspective sectional view oi' my apparatus ininitial position. Fig. l is a perspective View of my device in operativeposition. Fig. 2 is a central sectional elevation ofthe same, showingthe initial position of the cord. Fig. 3 is a perspective of therot-ating knotting-hooh detached. Fig. Ll is an elevation of the sameone-fourth revolution from the position in Fig. 3. Fig. 5 is anelevation ot' the same one-halt' turn from Fig. 3. Fig. (i is a top planof the knotting-hook. Fig. 7 is a bottom plan of the saine. Fig. 8 is aperspective of the holding-hook detached. Fig. 9 is a perspective ot themetallic frame or socket in which the knotting-hook works. Fig. l() is aperspective of the saine olle-halt' turn from Fig. 9. Fig. 1l is aperspective ot' the slotted top or 'cover-plate. l2 represents in sixdiagrams the operation of forming the knot.

A is the knotting-hook,mounted upon shaft B, and with its upper surfacein a plane perpendicular to the axis of said shaft. The outer edge ofthehook A is the segment of a circle whose center is coincident with theaxis of shaft B, and the inner edge of said hook is a volute bisectingthe circle at the pointed extremity of the hook A.

In the periphery or edge ot the hook A there is a deep groove, b,.andupon the face ot' said hookthere are grooves c d, concentric to thecenter of the shaft B. These grooves are severally adapted to receiveand conceal the ends of the strippers D E F, which projectfrorn theadjacent stationary surface ot' the surrounding case, and when the hookA is revolving backward they arrest the loops ot' cord and strip themfrom the hook, and thus discharge the knot fromvsaid hook.

The base ofthe hook A is supported upon the concave or hollow neck G,into which the cord glides as it is formed in a loop around the hook, asshown in diagram 2 oi' Fig. l2. The upper surface, c, of the base of thehook A is made sloping and smooth, softhat the loop of the cord willreadily slip from position 2 to position 3 of Fig. 12.

In the under side of the hook A, anda dis- Behind the notch H thereis-apivoted switchA or clasp, I, which is free to swing forward orbackward to let the cord pass it. When turned forward it covers andbridges the notch H, so that the cord will pass under and not into saidnotch. Power to rotate the hook is derived from any proper and competentsource, and is applied to the shaft B.

Surrounding the rotating hook A there is a circular frame, J, the innersurface whereof is of slightly greater radius than the Ahook A, and theupper surface of said frame is slightly above the face of said hook A.At one side there is a perpendicular notch, g, cutv in the edge of theframe J, and on one side said notch is undercut and provided with astationary oblique-edged cutter, h.

At a point distant from the cutter l1., about one-fourth the perimeter,there is permanently set a pin, D, which projects into the groove b inthe edge ofthe hook A, and in the vicinity of said pin the inner surfaceof the frame J is cnt away or chambered, as at t', so Ythat the cordwill notbe jammed and the movement of the hook clogged when the cord isarrested by said pin. For the same reason the inner surface of J is cntaway and chambered, also, at lc, in the vicinity ot the cutter l1.. Theframe J is provided with laterally-projecting ears l, for its attachmentto the supporting exterior frame; but the particular method ofattachment and support of said frame is immaterial.

A holding-hook, K, is arranged to move along the outer surface of theframe J, and seize the cord when itis presented in the notch g, and jamthe same against an exterior stationary part, which may be the exteriorsupporting-frame L, or it may be a plate placed there for that purposeonly. The movement of the holding-hook is made sufficient to draw outenough cord so that in the act ot tying the knotit can be paid back, soas to avoid undue strain upon the cord. The front edge of theholding-hook K is provided witll a notch, the edges ot which form anacute angle, into which the cord ends will be jammed and securely held,and to make this holding ed'ect still more positive, the notch mayterminate in a small cell or enlargement, into which the cord will becrowded and held by contact with more than one of its sides.

To insure the proper movement of the holding-hookK, it is mounted uponan arm, M, and provided with-a hub, m, which encircles the shaft B,andtherefore its movementis always axially coincident with the shaft B andhook A. The holding-hook is actuated by power applied automatically orotherwise to the lever or arm n., which projects from the arm M.

In order that the hook A may-be protected from accident, violence, Src.,and to insure a proper presentation of the cord,a cover-plate, P, isprovided, which is secured to the supporting frame-work in some properand convenient manner. Across the face of said cover there is a slot, p,through which alone the cord may enter to engage with the hook A. At theinner extremityof said slot there are two pins or ngers, E F, whichproject downward and enter severally the grooves c d in the face of thehook A, and act in conjunction with the pin D to arrest the cord duringthe backward rotation of the hook A, and strip the loop therefrom toform the knot.

Having now described the several parts of which my invention iscomposed, I will briefly describe the operation ot' forming the knottherewith. The old end of the core is held iu the notch of the holder Kand between said holder and the surface of the case L. From the holderthe cord passes along the surface of the case J to the notch g, andthence it passes through said notch and obliquely through the cover-slotp, around the bundle of grain, and back through said notchesp g, sideby`\side. In Fig. 2 only one of the parts ot' said cord is shown; but itis to be understood that two are presentand receive the. same treatmentin the knotter. When the cord has been thus la-id in the knotter theparts of the cord and of the knotter are in what I term the initialposition. It is shown in Fig. l. In Fig. l, however, the holder K isshown at the termination of its reciprocation forward from the initialposition, ready to receive the new cor'd to carryit against the cutterh. The point of the knotter-hook A is then behind the notch g, and as itbegins its rotation said point passes above the cord, as shown inposition 1, Fig. 12. About this time the hookA begins to draw upon thecord, and simultaneously therewith the holder is caused to move forwardfrom the initial position, so as to slacken or pay out the cord betweenit and the notch g,and thereby the cord from the old end is supplied toform the loop around the hook. The forward movement of the holdercontinues While the hook continues to draw upon the cord,and thenceases. From the other part of the cord the draft is directly upon thespool or other source of supply. When the hook A has made one-half arota tion the point a passes beneath the cord, as in position 2, Fig.12. The position ot' the cord as respects the hook will then be as shownin said figure, ventering above the hook, passing down through its bendand around behind its neck G. 'At the completion of one revolution thepoint a will have passed again above the cord and the cord will haveslipped over the inclined surface e, so as to form a turn or bightaround the base of the hook. The position of the knotting-hook is thensuch that the pins D E F are not in their grooves. A further advance ofa little more than one-fourth a revolution will bring it to position 3,Fig. l2, when the notch H has passed the cord a second time.

It will be observed that the forward movement of hook A causes the claspI to swing back or open by the action of the cord, thereby saving theemployment ot'a "clasp-opener]7 asheretotore used by me. The clasp isopened and held open by the cord until the reverse movement of the hookA brings the ends of IOC ILO

eresie the same into the hook H, and the loop which was formed back ofthe clasp is drawn over said hook, and thereby the ends drawn throughand alinotformed. Simultaneously with the reverse movement ofknottinghook A the holding-hook K is causedagain to advance, and, takingthe spool end ofthe cord in its notch, it immediately retreats to theinitial position and forces the cord across the stationary critter h,which seversit, so as to release the band from the holder, and at thesame time securely fastens the new end in the notch ot' the holder.During the reverse movement the loop or bight around the base ot' thehook will encounter the pins D E F, and be prevented from 'furtherretreat with the hook, which then begins to escape through said loop.The clasp I encounters the loop as the hook retreats through it andcloses forward, so as to cover and bridge the notch H, and the ends ot'the cord contined therein are thereby carried through the loop and theknot is formed. These effect-s are successively shown in positions 4, 5,and (i, ot' Fig. l2. After the discharge ofthe knot the spool-cord isagain carried through the notch gp.

Havingdescribed inyinvention, what l claim as new isl. Theknetterconstructed with its working extension substantially segmentaland its reversed hook, as described, the whole operating to lay the looparound it and to receive the part ofthe twine that is to form the bo wby a forward rotary movement,cotnbined with the latch I, situated andpivoted substantially as described, so that the twine iirst acted upon,or that which is to form the loop, may engage it and carry it backwardand shed overit, and thus form behind it, and in the reverse rotationact as a guide to conduct the loop over the bow and reversed hook.

2. The combination oi the reversed hook H and the concave ring J,operating as a resistant to the escape ot' the twine during the stressincident 'to tying the knot, substantially as set orth.

3. The curved knotting-hook A, provided with one or more circulargrooves, b c d, coinbined with one or more corresponding stationarystripping-pins, D E F, which enter said grooves, for the purpose setforth.

4. The holding-hook K, constructed with a deep notch, the sides whereofform an acute angle, combined with the stationary frame J andthe rotaryknotting-hook, as set forth.

5. The holding-hook or gripper K, having a rotary reciprocation upon anaxis coincident with the axis of the rotary knotter A, combined withsaid knotter A and the stationary frames J and L.

The combination, with the frame J, as an element of the holding`mechanism, ot' the hook K, mounted upon an arm, M, and provided with ahub, m, fitted to the exterior surface ofthe shaft B, whereby said hookand knotter will move on the same axis.

7. The rotary reciprocating holding-hook or gripper K and rotaryknotting-hook A, combined with the stationary knit'elt, located betweensaid gripper and hook.

S. The rotary kuotting-hoolt A, combined with the gripper K andabutmentL, arranged to pay out or let slip so much cord as may berequired to form the knot, as set forth.

9. The curved knotting-hook A, to which is impartedarotaryreciprocatiou,combined with the circular frame J, closely litting theperimeter ot' said hook, and provided with recesses z' k, as set t'ortb.

10. In a grainbinder, the combination of a rotary knot-tyer and a rotarycord-holder revolving about the same common aXisin reverse directions,for the purposes set forth.

1l. A stationary stripper or clearer, in combination with arotarytying-head, made of cir cular form, and provided with a circumferentialgroove to receive the end ofthe clearer, whereby the stationary cleareris enabled to remain in engagement with the cord and to remove the samein a positive manner.

WILLIAM WORTH BURSON.

Witnesses:

ALFRED L. CLARKE, B. W. KELLY.

